Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/scsi/wd7000.c b/drivers/scsi/wd7000.c
new file mode 100644
index 0000000..bf4a758
--- /dev/null
+++ b/drivers/scsi/wd7000.c
@@ -0,0 +1,1667 @@
+/* $Id: $
+ * linux/drivers/scsi/wd7000.c
+ *
+ * Copyright (C) 1992 Thomas Wuensche
+ * closely related to the aha1542 driver from Tommy Thorn
+ * ( as close as different hardware allows on a lowlevel-driver :-) )
+ *
+ * Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to
+ * accommodate Eric Youngdale's modifications to scsi.c. Nov 1992.
+ *
+ * Additional changes to support scatter/gather. Dec. 1992. tw/jb
+ *
+ * No longer tries to reset SCSI bus at boot (it wasn't working anyway).
+ * Rewritten to support multiple host adapters.
+ * Miscellaneous cleanup.
+ * So far, still doesn't do reset or abort correctly, since I have no idea
+ * how to do them with this board (8^(. Jan 1994 jb
+ *
+ * This driver now supports both of the two standard configurations (per
+ * the 3.36 Owner's Manual, my latest reference) by the same method as
+ * before; namely, by looking for a BIOS signature. Thus, the location of
+ * the BIOS signature determines the board configuration. Until I have
+ * time to do something more flexible, users should stick to one of the
+ * following:
+ *
+ * Standard configuration for single-adapter systems:
+ * - BIOS at CE00h
+ * - I/O base address 350h
+ * - IRQ level 15
+ * - DMA channel 6
+ * Standard configuration for a second adapter in a system:
+ * - BIOS at C800h
+ * - I/O base address 330h
+ * - IRQ level 11
+ * - DMA channel 5
+ *
+ * Anyone who can recompile the kernel is welcome to add others as need
+ * arises, but unpredictable results may occur if there are conflicts.
+ * In any event, if there are multiple adapters in a system, they MUST
+ * use different I/O bases, IRQ levels, and DMA channels, since they will be
+ * indistinguishable (and in direct conflict) otherwise.
+ *
+ * As a point of information, the NO_OP command toggles the CMD_RDY bit
+ * of the status port, and this fact could be used as a test for the I/O
+ * base address (or more generally, board detection). There is an interrupt
+ * status port, so IRQ probing could also be done. I suppose the full
+ * DMA diagnostic could be used to detect the DMA channel being used. I
+ * haven't done any of this, though, because I think there's too much of
+ * a chance that such explorations could be destructive, if some other
+ * board's resources are used inadvertently. So, call me a wimp, but I
+ * don't want to try it. The only kind of exploration I trust is memory
+ * exploration, since it's more certain that reading memory won't be
+ * destructive.
+ *
+ * More to my liking would be a LILO boot command line specification, such
+ * as is used by the aha152x driver (and possibly others). I'll look into
+ * it, as I have time...
+ *
+ * I get mail occasionally from people who either are using or are
+ * considering using a WD7000 with Linux. There is a variety of
+ * nomenclature describing WD7000's. To the best of my knowledge, the
+ * following is a brief summary (from an old WD doc - I don't work for
+ * them or anything like that):
+ *
+ * WD7000-FASST2: This is a WD7000 board with the real-mode SST ROM BIOS
+ * installed. Last I heard, the BIOS was actually done by Columbia
+ * Data Products. The BIOS is only used by this driver (and thus
+ * by Linux) to identify the board; none of it can be executed under
+ * Linux.
+ *
+ * WD7000-ASC: This is the original adapter board, with or without BIOS.
+ * The board uses a WD33C93 or WD33C93A SBIC, which in turn is
+ * controlled by an onboard Z80 processor. The board interface
+ * visible to the host CPU is defined effectively by the Z80's
+ * firmware, and it is this firmware's revision level that is
+ * determined and reported by this driver. (The version of the
+ * on-board BIOS is of no interest whatsoever.) The host CPU has
+ * no access to the SBIC; hence the fact that it is a WD33C93 is
+ * also of no interest to this driver.
+ *
+ * WD7000-AX:
+ * WD7000-MX:
+ * WD7000-EX: These are newer versions of the WD7000-ASC. The -ASC is
+ * largely built from discrete components; these boards use more
+ * integration. The -AX is an ISA bus board (like the -ASC),
+ * the -MX is an MCA (i.e., PS/2) bus board), and the -EX is an
+ * EISA bus board.
+ *
+ * At the time of my documentation, the -?X boards were "future" products,
+ * and were not yet available. However, I vaguely recall that Thomas
+ * Wuensche had an -AX, so I believe at least it is supported by this
+ * driver. I have no personal knowledge of either -MX or -EX boards.
+ *
+ * P.S. Just recently, I've discovered (directly from WD and Future
+ * Domain) that all but the WD7000-EX have been out of production for
+ * two years now. FD has production rights to the 7000-EX, and are
+ * producing it under a new name, and with a new BIOS. If anyone has
+ * one of the FD boards, it would be nice to come up with a signature
+ * for it.
+ * J.B. Jan 1994.
+ *
+ *
+ * Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr>
+ *
+ * 08/24/1996.
+ *
+ * Enhancement for wd7000_detect function has been made, so you don't have
+ * to enter BIOS ROM address in initialisation data (see struct Config).
+ * We cannot detect IRQ, DMA and I/O base address for now, so we have to
+ * enter them as arguments while wd_7000 is detected. If someone has IRQ,
+ * DMA or I/O base address set to some other value, he can enter them in
+ * configuration without any problem. Also I wrote a function wd7000_setup,
+ * so now you can enter WD-7000 definition as kernel arguments,
+ * as in lilo.conf:
+ *
+ * append="wd7000=IRQ,DMA,IO"
+ *
+ * PS: If card BIOS ROM is disabled, function wd7000_detect now will recognize
+ * adapter, unlike the old one. Anyway, BIOS ROM from WD7000 adapter is
+ * useless for Linux. B^)
+ *
+ *
+ * 09/06/1996.
+ *
+ * Autodetecting of I/O base address from wd7000_detect function is removed,
+ * some little bugs removed, etc...
+ *
+ * Thanks to Roger Scott for driver debugging.
+ *
+ * 06/07/1997
+ *
+ * Added support for /proc file system (/proc/scsi/wd7000/[0...] files).
+ * Now, driver can handle hard disks with capacity >1GB.
+ *
+ * 01/15/1998
+ *
+ * Added support for BUS_ON and BUS_OFF parameters in config line.
+ * Miscellaneous cleanup.
+ *
+ * 03/01/1998
+ *
+ * WD7000 driver now work on kernels >= 2.1.x
+ *
+ *
+ * 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * use host->host_lock, not io_request_lock, cleanups
+ *
+ * 2002/10/04 - Alan Cox <alan@redhat.com>
+ *
+ * Use dev_id for interrupts, kill __FUNCTION__ pasting
+ * Add a lock for the scb pool, clean up all other cli/sti usage stuff
+ * Use the adapter lock for the other places we had the cli's
+ *
+ * 2002/10/06 - Alan Cox <alan@redhat.com>
+ *
+ * Switch to new style error handling
+ * Clean up delay to udelay, and yielding sleeps
+ * Make host reset actually reset the card
+ * Make everything static
+ *
+ * 2003/02/12 - Christoph Hellwig <hch@infradead.org>
+ *
+ * Cleaned up host template defintion
+ * Removed now obsolete wd7000.h
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+
+#include <asm/system.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsicam.h>
+
+
+#undef WD7000_DEBUG /* general debug */
+#ifdef WD7000_DEBUG
+#define dprintk printk
+#else
+#define dprintk(format,args...)
+#endif
+
+/*
+ * Mailbox structure sizes.
+ * I prefer to keep the number of ICMBs much larger than the number of
+ * OGMBs. OGMBs are used very quickly by the driver to start one or
+ * more commands, while ICMBs are used by the host adapter per command.
+ */
+#define OGMB_CNT 16
+#define ICMB_CNT 32
+
+/*
+ * Scb's are shared by all active adapters. So, if they all become busy,
+ * callers may be made to wait in alloc_scbs for them to free. That can
+ * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
+ * rather conserve memory, use a smaller number (> 0, of course) - things
+ * will should still work OK.
+ */
+#define MAX_SCBS 32
+
+/*
+ * In this version, sg_tablesize now defaults to WD7000_SG, and will
+ * be set to SG_NONE for older boards. This is the reverse of the
+ * previous default, and was changed so that the driver-level
+ * scsi_host_template would reflect the driver's support for scatter/
+ * gather.
+ *
+ * Also, it has been reported that boards at Revision 6 support scatter/
+ * gather, so the new definition of an "older" board has been changed
+ * accordingly.
+ */
+#define WD7000_Q 16
+#define WD7000_SG 16
+
+
+/*
+ * WD7000-specific mailbox structure
+ *
+ */
+typedef volatile struct mailbox {
+ unchar status;
+ unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
+} Mailbox;
+
+/*
+ * This structure should contain all per-adapter global data. I.e., any
+ * new global per-adapter data should put in here.
+ */
+typedef struct adapter {
+ struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
+ int iobase; /* This adapter's I/O base address */
+ int irq; /* This adapter's IRQ level */
+ int dma; /* This adapter's DMA channel */
+ int int_counter; /* This adapter's interrupt counter */
+ int bus_on; /* This adapter's BUS_ON time */
+ int bus_off; /* This adapter's BUS_OFF time */
+ struct { /* This adapter's mailboxes */
+ Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
+ Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
+ } mb;
+ int next_ogmb; /* to reduce contention at mailboxes */
+ unchar control; /* shadows CONTROL port value */
+ unchar rev1, rev2; /* filled in by wd7000_revision */
+} Adapter;
+
+/*
+ * (linear) base address for ROM BIOS
+ */
+static const long wd7000_biosaddr[] = {
+ 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
+ 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
+};
+#define NUM_ADDRS (sizeof(wd7000_biosaddr)/sizeof(long))
+
+static const unsigned short wd7000_iobase[] = {
+ 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
+ 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
+ 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
+ 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
+};
+#define NUM_IOPORTS (sizeof(wd7000_iobase)/sizeof(unsigned short))
+
+static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
+#define NUM_IRQS (sizeof(wd7000_irq)/sizeof(short))
+
+static const short wd7000_dma[] = { 5, 6, 7 };
+#define NUM_DMAS (sizeof(wd7000_dma)/sizeof(short))
+
+/*
+ * The following is set up by wd7000_detect, and used thereafter for
+ * proc and other global ookups
+ */
+
+#define UNITS 8
+static struct Scsi_Host *wd7000_host[UNITS];
+
+#define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
+#define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
+
+/*
+ * Standard Adapter Configurations - used by wd7000_detect
+ */
+typedef struct {
+ short irq; /* IRQ level */
+ short dma; /* DMA channel */
+ unsigned iobase; /* I/O base address */
+ short bus_on; /* Time that WD7000 spends on the AT-bus when */
+ /* transferring data. BIOS default is 8000ns. */
+ short bus_off; /* Time that WD7000 spends OFF THE BUS after */
+ /* while it is transferring data. */
+ /* BIOS default is 1875ns */
+} Config;
+
+/*
+ * Add here your configuration...
+ */
+static Config configs[] = {
+ {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
+ {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
+ {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
+ {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
+};
+#define NUM_CONFIGS (sizeof(configs)/sizeof(Config))
+
+/*
+ * The following list defines strings to look for in the BIOS that identify
+ * it as the WD7000-FASST2 SST BIOS. I suspect that something should be
+ * added for the Future Domain version.
+ */
+typedef struct signature {
+ const char *sig; /* String to look for */
+ unsigned long ofs; /* offset from BIOS base address */
+ unsigned len; /* length of string */
+} Signature;
+
+static const Signature signatures[] = {
+ {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
+};
+#define NUM_SIGNATURES (sizeof(signatures)/sizeof(Signature))
+
+
+/*
+ * I/O Port Offsets and Bit Definitions
+ * 4 addresses are used. Those not defined here are reserved.
+ */
+#define ASC_STAT 0 /* Status, Read */
+#define ASC_COMMAND 0 /* Command, Write */
+#define ASC_INTR_STAT 1 /* Interrupt Status, Read */
+#define ASC_INTR_ACK 1 /* Acknowledge, Write */
+#define ASC_CONTROL 2 /* Control, Write */
+
+/*
+ * ASC Status Port
+ */
+#define INT_IM 0x80 /* Interrupt Image Flag */
+#define CMD_RDY 0x40 /* Command Port Ready */
+#define CMD_REJ 0x20 /* Command Port Byte Rejected */
+#define ASC_INIT 0x10 /* ASC Initialized Flag */
+#define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
+
+/*
+ * COMMAND opcodes
+ *
+ * Unfortunately, I have no idea how to properly use some of these commands,
+ * as the OEM manual does not make it clear. I have not been able to use
+ * enable/disable unsolicited interrupts or the reset commands with any
+ * discernible effect whatsoever. I think they may be related to certain
+ * ICB commands, but again, the OEM manual doesn't make that clear.
+ */
+#define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
+#define INITIALIZATION 1 /* initialization (10 bytes) */
+#define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
+#define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
+#define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
+#define SOFT_RESET 5 /* SCSI bus soft reset */
+#define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
+#define START_OGMB 0x80 /* start command in OGMB (n) */
+#define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
+ /* where (n) = lower 6 bits */
+/*
+ * For INITIALIZATION:
+ */
+typedef struct initCmd {
+ unchar op; /* command opcode (= 1) */
+ unchar ID; /* Adapter's SCSI ID */
+ unchar bus_on; /* Bus on time, x 125ns (see below) */
+ unchar bus_off; /* Bus off time, "" "" */
+ unchar rsvd; /* Reserved */
+ unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
+ unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
+ unchar icmbs; /* Number of incoming MBs, "" "" */
+} InitCmd;
+
+/*
+ * Interrupt Status Port - also returns diagnostic codes at ASC reset
+ *
+ * if msb is zero, the lower bits are diagnostic status
+ * Diagnostics:
+ * 01 No diagnostic error occurred
+ * 02 RAM failure
+ * 03 FIFO R/W failed
+ * 04 SBIC register read/write failed
+ * 05 Initialization D-FF failed
+ * 06 Host IRQ D-FF failed
+ * 07 ROM checksum error
+ * Interrupt status (bitwise):
+ * 10NNNNNN outgoing mailbox NNNNNN is free
+ * 11NNNNNN incoming mailbox NNNNNN needs service
+ */
+#define MB_INTR 0xC0 /* Mailbox Service possible/required */
+#define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
+#define MB_MASK 0x3f /* mask for mailbox number */
+
+/*
+ * CONTROL port bits
+ */
+#define INT_EN 0x08 /* Interrupt Enable */
+#define DMA_EN 0x04 /* DMA Enable */
+#define SCSI_RES 0x02 /* SCSI Reset */
+#define ASC_RES 0x01 /* ASC Reset */
+
+/*
+ * Driver data structures:
+ * - mb and scbs are required for interfacing with the host adapter.
+ * An SCB has extra fields not visible to the adapter; mb's
+ * _cannot_ do this, since the adapter assumes they are contiguous in
+ * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
+ * to access them.
+ * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
+ * the additional bytes are used only by the driver.
+ * - For now, a pool of SCBs are kept in global storage by this driver,
+ * and are allocated and freed as needed.
+ *
+ * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
+ * not when it has finished. Since the SCB must be around for completion,
+ * problems arise when SCBs correspond to OGMBs, which may be reallocated
+ * earlier (or delayed unnecessarily until a command completes).
+ * Mailboxes are used as transient data structures, simply for
+ * carrying SCB addresses to/from the 7000-FASST2.
+ *
+ * Note also since SCBs are not "permanently" associated with mailboxes,
+ * there is no need to keep a global list of scsi_cmnd pointers indexed
+ * by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox
+ * indices need not be involved.
+ */
+
+/*
+ * WD7000-specific scatter/gather element structure
+ */
+typedef struct sgb {
+ unchar len[3];
+ unchar ptr[3]; /* Also SCSI-style - MSB first */
+} Sgb;
+
+typedef struct scb { /* Command Control Block 5.4.1 */
+ unchar op; /* Command Control Block Operation Code */
+ unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
+ /* Outbound data transfer, length is checked */
+ /* Inbound data transfer, length is checked */
+ /* Logical Unit Number */
+ unchar cdb[12]; /* SCSI Command Block */
+ volatile unchar status; /* SCSI Return Status */
+ volatile unchar vue; /* Vendor Unique Error Code */
+ unchar maxlen[3]; /* Maximum Data Transfer Length */
+ unchar dataptr[3]; /* SCSI Data Block Pointer */
+ unchar linkptr[3]; /* Next Command Link Pointer */
+ unchar direc; /* Transfer Direction */
+ unchar reserved2[6]; /* SCSI Command Descriptor Block */
+ /* end of hardware SCB */
+ struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */
+ Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
+ Adapter *host; /* host adapter */
+ struct scb *next; /* for lists of scbs */
+} Scb;
+
+/*
+ * This driver is written to allow host-only commands to be executed.
+ * These use a 16-byte block called an ICB. The format is extended by the
+ * driver to 18 bytes, to support the status returned in the ICMB and
+ * an execution phase code.
+ *
+ * There are other formats besides these; these are the ones I've tried
+ * to use. Formats for some of the defined ICB opcodes are not defined
+ * (notably, get/set unsolicited interrupt status) in my copy of the OEM
+ * manual, and others are ambiguous/hard to follow.
+ */
+#define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
+#define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
+#define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
+#define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
+#define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
+#define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
+#define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
+ /* 0x87 is reserved */
+#define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
+#define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
+#define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
+#define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
+#define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
+#define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
+#define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
+#define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
+
+typedef struct icbRecvCmd {
+ unchar op;
+ unchar IDlun; /* Initiator SCSI ID/lun */
+ unchar len[3]; /* command buffer length */
+ unchar ptr[3]; /* command buffer address */
+ unchar rsvd[7]; /* reserved */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbRecvCmd;
+
+typedef struct icbSendStat {
+ unchar op;
+ unchar IDlun; /* Target SCSI ID/lun */
+ unchar stat; /* (outgoing) completion status byte 1 */
+ unchar rsvd[12]; /* reserved */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbSendStat;
+
+typedef struct icbRevLvl {
+ unchar op;
+ volatile unchar primary; /* primary revision level (returned) */
+ volatile unchar secondary; /* secondary revision level (returned) */
+ unchar rsvd[12]; /* reserved */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbRevLvl;
+
+typedef struct icbUnsMask { /* I'm totally guessing here */
+ unchar op;
+ volatile unchar mask[14]; /* mask bits */
+#if 0
+ unchar rsvd[12]; /* reserved */
+#endif
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbUnsMask;
+
+typedef struct icbDiag {
+ unchar op;
+ unchar type; /* diagnostics type code (0-3) */
+ unchar len[3]; /* buffer length */
+ unchar ptr[3]; /* buffer address */
+ unchar rsvd[7]; /* reserved */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbDiag;
+
+#define ICB_DIAG_POWERUP 0 /* Power-up diags only */
+#define ICB_DIAG_WALKING 1 /* walking 1's pattern */
+#define ICB_DIAG_DMA 2 /* DMA - system memory diags */
+#define ICB_DIAG_FULL 3 /* do both 1 & 2 */
+
+typedef struct icbParms {
+ unchar op;
+ unchar rsvd1; /* reserved */
+ unchar len[3]; /* parms buffer length */
+ unchar ptr[3]; /* parms buffer address */
+ unchar idx[2]; /* index (MSB-LSB) */
+ unchar rsvd2[5]; /* reserved */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbParms;
+
+typedef struct icbAny {
+ unchar op;
+ unchar data[14]; /* format-specific data */
+ volatile unchar vue; /* vendor-unique error code */
+ volatile unchar status; /* returned (icmb) status */
+ volatile unchar phase; /* used by interrupt handler */
+} IcbAny;
+
+typedef union icb {
+ unchar op; /* ICB opcode */
+ IcbRecvCmd recv_cmd; /* format for receive command */
+ IcbSendStat send_stat; /* format for send status */
+ IcbRevLvl rev_lvl; /* format for get revision level */
+ IcbDiag diag; /* format for execute diagnostics */
+ IcbParms eparms; /* format for get/set exec parms */
+ IcbAny icb; /* generic format */
+ unchar data[18];
+} Icb;
+
+#ifdef MODULE
+static char *wd7000;
+module_param(wd7000, charp, 0);
+#endif
+
+/*
+ * Driver SCB structure pool.
+ *
+ * The SCBs declared here are shared by all host adapters; hence, this
+ * structure is not part of the Adapter structure.
+ */
+static Scb scbs[MAX_SCBS];
+static Scb *scbfree; /* free list */
+static int freescbs = MAX_SCBS; /* free list counter */
+static spinlock_t scbpool_lock; /* guards the scb free list and count */
+
+/*
+ * END of data/declarations - code follows.
+ */
+static void __init setup_error(char *mesg, int *ints)
+{
+ if (ints[0] == 3)
+ printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
+ else if (ints[0] == 4)
+ printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
+ else
+ printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], ints[5], mesg);
+}
+
+
+/*
+ * Note: You can now set these options from the kernel's "command line".
+ * The syntax is:
+ *
+ * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
+ *
+ * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
+ * are 8000ns for BUS_ON and 1875ns for BUS_OFF.
+ * eg:
+ * wd7000=7,6,0x350
+ *
+ * will configure the driver for a WD-7000 controller
+ * using IRQ 15 with a DMA channel 6, at IO base address 0x350.
+ */
+static int __init wd7000_setup(char *str)
+{
+ static short wd7000_card_num; /* .bss will zero this */
+ short i;
+ int ints[6];
+
+ (void) get_options(str, ARRAY_SIZE(ints), ints);
+
+ if (wd7000_card_num >= NUM_CONFIGS) {
+ printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __FUNCTION__);
+ return 0;
+ }
+
+ if ((ints[0] < 3) || (ints[0] > 5)) {
+ printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __FUNCTION__);
+ } else {
+ for (i = 0; i < NUM_IRQS; i++)
+ if (ints[1] == wd7000_irq[i])
+ break;
+
+ if (i == NUM_IRQS) {
+ setup_error("invalid IRQ.", ints);
+ return 0;
+ } else
+ configs[wd7000_card_num].irq = ints[1];
+
+ for (i = 0; i < NUM_DMAS; i++)
+ if (ints[2] == wd7000_dma[i])
+ break;
+
+ if (i == NUM_DMAS) {
+ setup_error("invalid DMA channel.", ints);
+ return 0;
+ } else
+ configs[wd7000_card_num].dma = ints[2];
+
+ for (i = 0; i < NUM_IOPORTS; i++)
+ if (ints[3] == wd7000_iobase[i])
+ break;
+
+ if (i == NUM_IOPORTS) {
+ setup_error("invalid I/O base address.", ints);
+ return 0;
+ } else
+ configs[wd7000_card_num].iobase = ints[3];
+
+ if (ints[0] > 3) {
+ if ((ints[4] < 500) || (ints[4] > 31875)) {
+ setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
+ configs[wd7000_card_num].bus_on = BUS_ON;
+ } else
+ configs[wd7000_card_num].bus_on = ints[4] / 125;
+ } else
+ configs[wd7000_card_num].bus_on = BUS_ON;
+
+ if (ints[0] > 4) {
+ if ((ints[5] < 500) || (ints[5] > 31875)) {
+ setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
+ configs[wd7000_card_num].bus_off = BUS_OFF;
+ } else
+ configs[wd7000_card_num].bus_off = ints[5] / 125;
+ } else
+ configs[wd7000_card_num].bus_off = BUS_OFF;
+
+ if (wd7000_card_num) {
+ for (i = 0; i < (wd7000_card_num - 1); i++) {
+ int j = i + 1;
+
+ for (; j < wd7000_card_num; j++)
+ if (configs[i].irq == configs[j].irq) {
+ setup_error("duplicated IRQ!", ints);
+ return 0;
+ }
+ if (configs[i].dma == configs[j].dma) {
+ setup_error("duplicated DMA " "channel!", ints);
+ return 0;
+ }
+ if (configs[i].iobase == configs[j].iobase) {
+ setup_error("duplicated I/O " "base address!", ints);
+ return 0;
+ }
+ }
+ }
+
+ dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
+ "BUS_ON=%dns, BUS_OFF=%dns\n", configs[wd7000_card_num].irq, configs[wd7000_card_num].dma, configs[wd7000_card_num].iobase, configs[wd7000_card_num].bus_on * 125, configs[wd7000_card_num].bus_off * 125);
+
+ wd7000_card_num++;
+ }
+ return 1;
+}
+
+__setup("wd7000=", wd7000_setup);
+
+static inline void any2scsi(unchar * scsi, int any)
+{
+ *scsi++ = (unsigned)any >> 16;
+ *scsi++ = (unsigned)any >> 8;
+ *scsi++ = any;
+}
+
+static inline int scsi2int(unchar * scsi)
+{
+ return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
+}
+
+static inline void wd7000_enable_intr(Adapter * host)
+{
+ host->control |= INT_EN;
+ outb(host->control, host->iobase + ASC_CONTROL);
+}
+
+
+static inline void wd7000_enable_dma(Adapter * host)
+{
+ unsigned long flags;
+ host->control |= DMA_EN;
+ outb(host->control, host->iobase + ASC_CONTROL);
+
+ flags = claim_dma_lock();
+ set_dma_mode(host->dma, DMA_MODE_CASCADE);
+ enable_dma(host->dma);
+ release_dma_lock(flags);
+
+}
+
+
+#define WAITnexttimeout 200 /* 2 seconds */
+
+static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
+{
+ unsigned WAITbits;
+ unsigned long WAITtimeout = jiffies + WAITnexttimeout;
+
+ while (time_before_eq(jiffies, WAITtimeout)) {
+ WAITbits = inb(port) & mask;
+
+ if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
+ return (0);
+ }
+
+ return (1);
+}
+
+
+static inline int command_out(Adapter * host, unchar * cmd, int len)
+{
+ if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
+ while (len--) {
+ do {
+ outb(*cmd, host->iobase + ASC_COMMAND);
+ WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
+ } while (inb(host->iobase + ASC_STAT) & CMD_REJ);
+
+ cmd++;
+ }
+
+ return (1);
+ }
+
+ printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
+
+ return (0);
+}
+
+
+/*
+ * This version of alloc_scbs is in preparation for supporting multiple
+ * commands per lun and command chaining, by queueing pending commands.
+ * We will need to allocate Scbs in blocks since they will wait to be
+ * executed so there is the possibility of deadlock otherwise.
+ * Also, to keep larger requests from being starved by smaller requests,
+ * we limit access to this routine with an internal busy flag, so that
+ * the satisfiability of a request is not dependent on the size of the
+ * request.
+ */
+static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
+{
+ Scb *scb, *p = NULL;
+ unsigned long flags;
+ unsigned long timeout = jiffies + WAITnexttimeout;
+ unsigned long now;
+ int i;
+
+ if (needed <= 0)
+ return (NULL); /* sanity check */
+
+ spin_unlock_irq(host->host_lock);
+
+ retry:
+ while (freescbs < needed) {
+ timeout = jiffies + WAITnexttimeout;
+ do {
+ /* FIXME: can we actually just yield here ?? */
+ for (now = jiffies; now == jiffies;)
+ cpu_relax(); /* wait a jiffy */
+ } while (freescbs < needed && time_before_eq(jiffies, timeout));
+ /*
+ * If we get here with enough free Scbs, we can take them.
+ * Otherwise, we timed out and didn't get enough.
+ */
+ if (freescbs < needed) {
+ printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
+ return (NULL);
+ }
+ }
+
+ /* Take the lock, then check we didnt get beaten, if so try again */
+ spin_lock_irqsave(&scbpool_lock, flags);
+ if (freescbs < needed) {
+ spin_unlock_irqrestore(&scbpool_lock, flags);
+ goto retry;
+ }
+
+ scb = scbfree;
+ freescbs -= needed;
+ for (i = 0; i < needed; i++) {
+ p = scbfree;
+ scbfree = p->next;
+ }
+ p->next = NULL;
+
+ spin_unlock_irqrestore(&scbpool_lock, flags);
+
+ spin_lock_irq(host->host_lock);
+ return (scb);
+}
+
+
+static inline void free_scb(Scb * scb)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&scbpool_lock, flags);
+
+ memset(scb, 0, sizeof(Scb));
+ scb->next = scbfree;
+ scbfree = scb;
+ freescbs++;
+
+ spin_unlock_irqrestore(&scbpool_lock, flags);
+}
+
+
+static inline void init_scbs(void)
+{
+ int i;
+
+ spin_lock_init(&scbpool_lock);
+
+ /* This is only ever called before the SCB pool is active */
+
+ scbfree = &(scbs[0]);
+ memset(scbs, 0, sizeof(scbs));
+ for (i = 0; i < MAX_SCBS - 1; i++) {
+ scbs[i].next = &(scbs[i + 1]);
+ scbs[i].SCpnt = NULL;
+ }
+ scbs[MAX_SCBS - 1].next = NULL;
+ scbs[MAX_SCBS - 1].SCpnt = NULL;
+}
+
+
+static int mail_out(Adapter * host, Scb * scbptr)
+/*
+ * Note: this can also be used for ICBs; just cast to the parm type.
+ */
+{
+ int i, ogmb;
+ unsigned long flags;
+ unchar start_ogmb;
+ Mailbox *ogmbs = host->mb.ogmb;
+ int *next_ogmb = &(host->next_ogmb);
+
+ dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
+
+ /* We first look for a free outgoing mailbox */
+ spin_lock_irqsave(host->sh->host_lock, flags);
+ ogmb = *next_ogmb;
+ for (i = 0; i < OGMB_CNT; i++) {
+ if (ogmbs[ogmb].status == 0) {
+ dprintk(" using OGMB 0x%x", ogmb);
+ ogmbs[ogmb].status = 1;
+ any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
+
+ *next_ogmb = (ogmb + 1) % OGMB_CNT;
+ break;
+ } else
+ ogmb = (ogmb + 1) % OGMB_CNT;
+ }
+ spin_unlock_irqrestore(host->sh->host_lock, flags);
+
+ dprintk(", scb is 0x%06lx", (long) scbptr);
+
+ if (i >= OGMB_CNT) {
+ /*
+ * Alternatively, we might issue the "interrupt on free OGMB",
+ * and sleep, but it must be ensured that it isn't the init
+ * task running. Instead, this version assumes that the caller
+ * will be persistent, and try again. Since it's the adapter
+ * that marks OGMB's free, waiting even with interrupts off
+ * should work, since they are freed very quickly in most cases.
+ */
+ dprintk(", no free OGMBs.\n");
+ return (0);
+ }
+
+ wd7000_enable_intr(host);
+
+ start_ogmb = START_OGMB | ogmb;
+ command_out(host, &start_ogmb, 1);
+
+ dprintk(", awaiting interrupt.\n");
+
+ return (1);
+}
+
+
+static int make_code(unsigned hosterr, unsigned scsierr)
+{
+#ifdef WD7000_DEBUG
+ int in_error = hosterr;
+#endif
+
+ switch ((hosterr >> 8) & 0xff) {
+ case 0: /* Reserved */
+ hosterr = DID_ERROR;
+ break;
+ case 1: /* Command Complete, no errors */
+ hosterr = DID_OK;
+ break;
+ case 2: /* Command complete, error logged in scb status (scsierr) */
+ hosterr = DID_OK;
+ break;
+ case 4: /* Command failed to complete - timeout */
+ hosterr = DID_TIME_OUT;
+ break;
+ case 5: /* Command terminated; Bus reset by external device */
+ hosterr = DID_RESET;
+ break;
+ case 6: /* Unexpected Command Received w/ host as target */
+ hosterr = DID_BAD_TARGET;
+ break;
+ case 80: /* Unexpected Reselection */
+ case 81: /* Unexpected Selection */
+ hosterr = DID_BAD_INTR;
+ break;
+ case 82: /* Abort Command Message */
+ hosterr = DID_ABORT;
+ break;
+ case 83: /* SCSI Bus Software Reset */
+ case 84: /* SCSI Bus Hardware Reset */
+ hosterr = DID_RESET;
+ break;
+ default: /* Reserved */
+ hosterr = DID_ERROR;
+ }
+#ifdef WD7000_DEBUG
+ if (scsierr || hosterr)
+ dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
+#endif
+ return (scsierr | (hosterr << 16));
+}
+
+#define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
+
+
+static irqreturn_t wd7000_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ Adapter *host = (Adapter *) dev_id;
+ int flag, icmb, errstatus, icmb_status;
+ int host_error, scsi_error;
+ Scb *scb; /* for SCSI commands */
+ IcbAny *icb; /* for host commands */
+ struct scsi_cmnd *SCpnt;
+ Mailbox *icmbs = host->mb.icmb;
+ unsigned long flags;
+
+ spin_lock_irqsave(host->sh->host_lock, flags);
+ host->int_counter++;
+
+ dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
+
+ flag = inb(host->iobase + ASC_INTR_STAT);
+
+ dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
+
+ if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
+ /* NB: these are _very_ possible if IRQ 15 is being used, since
+ * it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
+ * any interrupt signal into the 8259 which can't be identified
+ * comes out as 7 from the 8259, which is 15 to the host. Thus, it
+ * is a good thing the WD7000 has an interrupt status port, so we
+ * can sort these out. Otherwise, electrical noise and other such
+ * problems would be indistinguishable from valid interrupts...
+ */
+ dprintk("wd7000_intr: phantom interrupt...\n");
+ goto ack;
+ }
+
+ if (!(flag & MB_INTR))
+ goto ack;
+
+ /* The interrupt is for a mailbox */
+ if (!(flag & IMB_INTR)) {
+ dprintk("wd7000_intr: free outgoing mailbox\n");
+ /*
+ * If sleep_on() and the "interrupt on free OGMB" command are
+ * used in mail_out(), wake_up() should correspondingly be called
+ * here. For now, we don't need to do anything special.
+ */
+ goto ack;
+ }
+
+ /* The interrupt is for an incoming mailbox */
+ icmb = flag & MB_MASK;
+ icmb_status = icmbs[icmb].status;
+ if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
+ dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status);
+ goto ack;
+ }
+
+ /* Aaaargh! (Zaga) */
+ scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
+ icmbs[icmb].status = 0;
+ if (scb->op & ICB_OP_MASK) { /* an SCB is done */
+ icb = (IcbAny *) scb;
+ icb->status = icmb_status;
+ icb->phase = 0;
+ goto ack;
+ }
+
+ SCpnt = scb->SCpnt;
+ if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
+ host_error = scb->vue | (icmb_status << 8);
+ scsi_error = scb->status;
+ errstatus = make_code(host_error, scsi_error);
+ SCpnt->result = errstatus;
+
+ free_scb(scb);
+
+ SCpnt->scsi_done(SCpnt);
+ }
+
+ ack:
+ dprintk("wd7000_intr: return from interrupt handler\n");
+ wd7000_intr_ack(host);
+
+ spin_unlock_irqrestore(host->sh->host_lock, flags);
+ return IRQ_HANDLED;
+}
+
+static int wd7000_queuecommand(struct scsi_cmnd *SCpnt,
+ void (*done)(struct scsi_cmnd *))
+{
+ Scb *scb;
+ Sgb *sgb;
+ unchar *cdb = (unchar *) SCpnt->cmnd;
+ unchar idlun;
+ short cdblen;
+ Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
+
+ cdblen = SCpnt->cmd_len;
+ idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
+ SCpnt->scsi_done = done;
+ SCpnt->SCp.phase = 1;
+ scb = alloc_scbs(SCpnt->device->host, 1);
+ scb->idlun = idlun;
+ memcpy(scb->cdb, cdb, cdblen);
+ scb->direc = 0x40; /* Disable direction check */
+
+ scb->SCpnt = SCpnt; /* so we can find stuff later */
+ SCpnt->host_scribble = (unchar *) scb;
+ scb->host = host;
+
+ if (SCpnt->use_sg) {
+ struct scatterlist *sg = (struct scatterlist *) SCpnt->request_buffer;
+ unsigned i;
+
+ if (SCpnt->device->host->sg_tablesize == SG_NONE) {
+ panic("wd7000_queuecommand: scatter/gather not supported.\n");
+ }
+ dprintk("Using scatter/gather with %d elements.\n", SCpnt->use_sg);
+
+ sgb = scb->sgb;
+ scb->op = 1;
+ any2scsi(scb->dataptr, (int) sgb);
+ any2scsi(scb->maxlen, SCpnt->use_sg * sizeof(Sgb));
+
+ for (i = 0; i < SCpnt->use_sg; i++) {
+ any2scsi(sgb[i].ptr, isa_page_to_bus(sg[i].page) + sg[i].offset);
+ any2scsi(sgb[i].len, sg[i].length);
+ }
+ } else {
+ scb->op = 0;
+ any2scsi(scb->dataptr, isa_virt_to_bus(SCpnt->request_buffer));
+ any2scsi(scb->maxlen, SCpnt->request_bufflen);
+ }
+
+ /* FIXME: drop lock and yield here ? */
+
+ while (!mail_out(host, scb))
+ cpu_relax(); /* keep trying */
+
+ return 0;
+}
+
+static int wd7000_diagnostics(Adapter * host, int code)
+{
+ static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
+ static unchar buf[256];
+ unsigned long timeout;
+
+ icb.type = code;
+ any2scsi(icb.len, sizeof(buf));
+ any2scsi(icb.ptr, (int) &buf);
+ icb.phase = 1;
+ /*
+ * This routine is only called at init, so there should be OGMBs
+ * available. I'm assuming so here. If this is going to
+ * fail, I can just let the timeout catch the failure.
+ */
+ mail_out(host, (struct scb *) &icb);
+ timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */
+ while (icb.phase && time_before(jiffies, timeout)) {
+ cpu_relax(); /* wait for completion */
+ barrier();
+ }
+
+ if (icb.phase) {
+ printk("wd7000_diagnostics: timed out.\n");
+ return (0);
+ }
+ if (make_code(icb.vue | (icb.status << 8), 0)) {
+ printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
+ return (0);
+ }
+
+ return (1);
+}
+
+
+static int wd7000_adapter_reset(Adapter * host)
+{
+ InitCmd init_cmd = {
+ INITIALIZATION,
+ 7,
+ host->bus_on,
+ host->bus_off,
+ 0,
+ {0, 0, 0},
+ OGMB_CNT,
+ ICMB_CNT
+ };
+ int diag;
+ /*
+ * Reset the adapter - only. The SCSI bus was initialized at power-up,
+ * and we need to do this just so we control the mailboxes, etc.
+ */
+ outb(ASC_RES, host->iobase + ASC_CONTROL);
+ udelay(40); /* reset pulse: this is 40us, only need 25us */
+ outb(0, host->iobase + ASC_CONTROL);
+ host->control = 0; /* this must always shadow ASC_CONTROL */
+
+ if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
+ printk(KERN_ERR "wd7000_init: WAIT timed out.\n");
+ return -1; /* -1 = not ok */
+ }
+
+ if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
+ printk("wd7000_init: ");
+
+ switch (diag) {
+ case 2:
+ printk(KERN_ERR "RAM failure.\n");
+ break;
+ case 3:
+ printk(KERN_ERR "FIFO R/W failed\n");
+ break;
+ case 4:
+ printk(KERN_ERR "SBIC register R/W failed\n");
+ break;
+ case 5:
+ printk(KERN_ERR "Initialization D-FF failed.\n");
+ break;
+ case 6:
+ printk(KERN_ERR "Host IRQ D-FF failed.\n");
+ break;
+ case 7:
+ printk(KERN_ERR "ROM checksum error.\n");
+ break;
+ default:
+ printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
+ }
+ return -1;
+ }
+ /* Clear mailboxes */
+ memset(&(host->mb), 0, sizeof(host->mb));
+
+ /* Execute init command */
+ any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb));
+ if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) {
+ printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n");
+ return -1;
+ }
+
+ if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
+ printk("wd7000_adapter_reset: WAIT timed out.\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int wd7000_init(Adapter * host)
+{
+ if (wd7000_adapter_reset(host) == -1)
+ return 0;
+
+
+ if (request_irq(host->irq, wd7000_intr, SA_INTERRUPT, "wd7000", host)) {
+ printk("wd7000_init: can't get IRQ %d.\n", host->irq);
+ return (0);
+ }
+ if (request_dma(host->dma, "wd7000")) {
+ printk("wd7000_init: can't get DMA channel %d.\n", host->dma);
+ free_irq(host->irq, host);
+ return (0);
+ }
+ wd7000_enable_dma(host);
+ wd7000_enable_intr(host);
+
+ if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
+ free_dma(host->dma);
+ free_irq(host->irq, NULL);
+ return (0);
+ }
+
+ return (1);
+}
+
+
+static void wd7000_revision(Adapter * host)
+{
+ static IcbRevLvl icb = { ICB_OP_GET_REVISION };
+
+ icb.phase = 1;
+ /*
+ * Like diagnostics, this is only done at init time, in fact, from
+ * wd7000_detect, so there should be OGMBs available. If it fails,
+ * the only damage will be that the revision will show up as 0.0,
+ * which in turn means that scatter/gather will be disabled.
+ */
+ mail_out(host, (struct scb *) &icb);
+ while (icb.phase) {
+ cpu_relax(); /* wait for completion */
+ barrier();
+ }
+ host->rev1 = icb.primary;
+ host->rev2 = icb.secondary;
+}
+
+
+#undef SPRINTF
+#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
+
+static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host)
+{
+ dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
+
+ /*
+ * Currently this is a no-op
+ */
+ dprintk("Sorry, this function is currently out of order...\n");
+ return (length);
+}
+
+
+static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
+{
+ Adapter *adapter = (Adapter *)host->hostdata;
+ unsigned long flags;
+ char *pos = buffer;
+#ifdef WD7000_DEBUG
+ Mailbox *ogmbs, *icmbs;
+ short count;
+#endif
+
+ /*
+ * Has data been written to the file ?
+ */
+ if (inout)
+ return (wd7000_set_info(buffer, length, host));
+
+ spin_lock_irqsave(host->host_lock, flags);
+ SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
+ SPRINTF(" IO base: 0x%x\n", adapter->iobase);
+ SPRINTF(" IRQ: %d\n", adapter->irq);
+ SPRINTF(" DMA channel: %d\n", adapter->dma);
+ SPRINTF(" Interrupts: %d\n", adapter->int_counter);
+ SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
+ SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
+
+#ifdef WD7000_DEBUG
+ ogmbs = adapter->mb.ogmb;
+ icmbs = adapter->mb.icmb;
+
+ SPRINTF("\nControl port value: 0x%x\n", adapter->control);
+ SPRINTF("Incoming mailbox:\n");
+ SPRINTF(" size: %d\n", ICMB_CNT);
+ SPRINTF(" queued messages: ");
+
+ for (i = count = 0; i < ICMB_CNT; i++)
+ if (icmbs[i].status) {
+ count++;
+ SPRINTF("0x%x ", i);
+ }
+
+ SPRINTF(count ? "\n" : "none\n");
+
+ SPRINTF("Outgoing mailbox:\n");
+ SPRINTF(" size: %d\n", OGMB_CNT);
+ SPRINTF(" next message: 0x%x\n", adapter->next_ogmb);
+ SPRINTF(" queued messages: ");
+
+ for (i = count = 0; i < OGMB_CNT; i++)
+ if (ogmbs[i].status) {
+ count++;
+ SPRINTF("0x%x ", i);
+ }
+
+ SPRINTF(count ? "\n" : "none\n");
+#endif
+
+ spin_unlock_irqrestore(host->host_lock, flags);
+
+ /*
+ * Calculate start of next buffer, and return value.
+ */
+ *start = buffer + offset;
+
+ if ((pos - buffer) < offset)
+ return (0);
+ else if ((pos - buffer - offset) < length)
+ return (pos - buffer - offset);
+ else
+ return (length);
+}
+
+
+/*
+ * Returns the number of adapters this driver is supporting.
+ *
+ * The source for hosts.c says to wait to call scsi_register until 100%
+ * sure about an adapter. We need to do it a little sooner here; we
+ * need the storage set up by scsi_register before wd7000_init, and
+ * changing the location of an Adapter structure is more trouble than
+ * calling scsi_unregister.
+ *
+ */
+
+static int wd7000_detect(struct scsi_host_template *tpnt)
+{
+ short present = 0, biosaddr_ptr, sig_ptr, i, pass;
+ short biosptr[NUM_CONFIGS];
+ unsigned iobase;
+ Adapter *host = NULL;
+ struct Scsi_Host *sh;
+ int unit = 0;
+
+ dprintk("wd7000_detect: started\n");
+
+#ifdef MODULE
+ if (wd7000)
+ wd7000_setup(wd7000);
+#endif
+
+ for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
+ for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
+
+ tpnt->proc_name = "wd7000";
+ tpnt->proc_info = &wd7000_proc_info;
+
+ /*
+ * Set up SCB free list, which is shared by all adapters
+ */
+ init_scbs();
+
+ for (pass = 0; pass < NUM_CONFIGS; pass++) {
+ /*
+ * First, search for BIOS SIGNATURE...
+ */
+ for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
+ for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
+ for (i = 0; i < pass; i++)
+ if (biosptr[i] == biosaddr_ptr)
+ break;
+
+ if (i == pass) {
+ void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
+ signatures[sig_ptr].len);
+ short bios_match = 1;
+
+ if (biosaddr)
+ bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
+
+ iounmap(biosaddr);
+
+ if (bios_match)
+ goto bios_matched;
+ }
+ }
+
+ bios_matched:
+ /*
+ * BIOS SIGNATURE has been found.
+ */
+#ifdef WD7000_DEBUG
+ dprintk("wd7000_detect: pass %d\n", pass + 1);
+
+ if (biosaddr_ptr == NUM_ADDRS)
+ dprintk("WD-7000 SST BIOS not detected...\n");
+ else
+ dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
+#endif
+
+ if (configs[pass].irq < 0)
+ continue;
+
+ if (unit == UNITS)
+ continue;
+
+ iobase = configs[pass].iobase;
+
+ dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
+
+ if (request_region(iobase, 4, "wd7000")) {
+
+ dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
+ /*
+ * ASC reset...
+ */
+ outb(ASC_RES, iobase + ASC_CONTROL);
+ msleep(10);
+ outb(0, iobase + ASC_CONTROL);
+
+ if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
+ dprintk("failed!\n");
+ goto err_release;
+ } else
+ dprintk("ok!\n");
+
+ if (inb(iobase + ASC_INTR_STAT) == 1) {
+ /*
+ * We register here, to get a pointer to the extra space,
+ * which we'll use as the Adapter structure (host) for
+ * this adapter. It is located just after the registered
+ * Scsi_Host structure (sh), and is located by the empty
+ * array hostdata.
+ */
+ sh = scsi_register(tpnt, sizeof(Adapter));
+ if (sh == NULL)
+ goto err_release;
+
+ host = (Adapter *) sh->hostdata;
+
+ dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
+ memset(host, 0, sizeof(Adapter));
+
+ host->irq = configs[pass].irq;
+ host->dma = configs[pass].dma;
+ host->iobase = iobase;
+ host->int_counter = 0;
+ host->bus_on = configs[pass].bus_on;
+ host->bus_off = configs[pass].bus_off;
+ host->sh = wd7000_host[unit] = sh;
+ unit++;
+
+ dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
+
+ if (!wd7000_init(host)) /* Initialization failed */
+ goto err_unregister;
+
+ /*
+ * OK from here - we'll use this adapter/configuration.
+ */
+ wd7000_revision(host); /* important for scatter/gather */
+
+ /*
+ * For boards before rev 6.0, scatter/gather isn't supported.
+ */
+ if (host->rev1 < 6)
+ sh->sg_tablesize = SG_NONE;
+
+ present++; /* count it */
+
+ if (biosaddr_ptr != NUM_ADDRS)
+ biosptr[pass] = biosaddr_ptr;
+
+ printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
+ printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
+ printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
+ }
+ } else
+ dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
+
+ continue;
+
+ err_unregister:
+ scsi_unregister(sh);
+ err_release:
+ release_region(iobase, 4);
+
+ }
+
+ if (!present)
+ printk("Failed initialization of WD-7000 SCSI card!\n");
+
+ return (present);
+}
+
+static int wd7000_release(struct Scsi_Host *shost)
+{
+ if (shost->irq)
+ free_irq(shost->irq, NULL);
+ if (shost->io_port && shost->n_io_port)
+ release_region(shost->io_port, shost->n_io_port);
+ scsi_unregister(shost);
+ return 0;
+}
+
+#if 0
+/*
+ * I have absolutely NO idea how to do an abort with the WD7000...
+ */
+static int wd7000_abort(Scsi_Cmnd * SCpnt)
+{
+ Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
+
+ if (inb(host->iobase + ASC_STAT) & INT_IM) {
+ printk("wd7000_abort: lost interrupt\n");
+ wd7000_intr_handle(host->irq, NULL, NULL);
+ return FAILED;
+ }
+ return FAILED;
+}
+#endif
+
+/*
+ * Last resort. Reinitialize the board.
+ */
+
+static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
+{
+ Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
+
+ if (wd7000_adapter_reset(host) < 0)
+ return FAILED;
+ wd7000_enable_intr(host);
+ return SUCCESS;
+}
+
+/*
+ * This was borrowed directly from aha1542.c. (Zaga)
+ */
+
+static int wd7000_biosparam(struct scsi_device *sdev,
+ struct block_device *bdev, sector_t capacity, int *ip)
+{
+ char b[BDEVNAME_SIZE];
+
+ dprintk("wd7000_biosparam: dev=%s, size=%d, ",
+ bdevname(bdev, b), capacity);
+ (void)b; /* unused var warning? */
+
+ /*
+ * try default translation
+ */
+ ip[0] = 64;
+ ip[1] = 32;
+ ip[2] = capacity >> 11;
+
+ /*
+ * for disks >1GB do some guessing
+ */
+ if (ip[2] >= 1024) {
+ int info[3];
+
+ /*
+ * try to figure out the geometry from the partition table
+ */
+ if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
+ printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
+
+ ip[0] = 255;
+ ip[1] = 63;
+ ip[2] = (unsigned long) capacity / (255 * 63);
+ } else {
+ ip[0] = info[0];
+ ip[1] = info[1];
+ ip[2] = info[2];
+
+ if (info[0] == 255)
+ printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __FUNCTION__);
+ }
+ }
+
+ dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
+ dprintk("WARNING: check, if the bios geometry is correct.\n");
+
+ return (0);
+}
+
+MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
+MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
+MODULE_LICENSE("GPL");
+
+static struct scsi_host_template driver_template = {
+ .proc_name = "wd7000",
+ .proc_info = wd7000_proc_info,
+ .name = "Western Digital WD-7000",
+ .detect = wd7000_detect,
+ .release = wd7000_release,
+ .queuecommand = wd7000_queuecommand,
+ .eh_host_reset_handler = wd7000_host_reset,
+ .bios_param = wd7000_biosparam,
+ .can_queue = WD7000_Q,
+ .this_id = 7,
+ .sg_tablesize = WD7000_SG,
+ .cmd_per_lun = 1,
+ .unchecked_isa_dma = 1,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+#include "scsi_module.c"